WORMHOLES IN STRING THEORY

被引：15

作者：

LYONS, A ^{[1
]}

HAWKING, SW ^{[1
]}

机构：

[1] UNIV CAMBRIDGE,DEPT APPL MATH & THEORET PHYS,CAMBRIDGE CB3 9EW,ENGLAND

来源：

PHYSICAL REVIEW D | 1991年 / 44卷 / 12期

关键词：

D O I：

10.1103/PhysRevD.44.3802

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We discuss the wormhole effective interactions in string theory, thought of as a sum over two-dimensional field theories on different world sheets. The effective interactions are calculated in the "dilute wormhole approximation," initially by considering the Green's functions on higher-genus Riemann surfaces, and then by calculating the effect of a complete basis of wave functions on scattering amplitudes for a surface with a boundary. The sum over wormholes is equivalent to having a world sheet of trivial topology and summing over different space-time and matter-field backgrounds. To leading order these consist of the massless fluctuations, since the tachyon cancels out when a sum is done over different spin structures going through the wormhole. In this way we recover quantized general relativity as an effective theory, from a sum over field theories on higher-genus Riemann surfaces.

引用

页码：3802 / 3818

页数：17

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